Selected problems of diagnosing toothed gears in the aspect of developing hums system

• Autorzy: Gębura A. , Stokowski M.

Identyfikatory

DOI

10.5604/01.3001.0012.7849

• Języki publikacji: EN

Abstrakty

EN

A diagnostic FDM-A method, based on the measurement of modulation of constituent frequency of direct current (DC) generator pulsation as well as FAM-C method, established on the measurement of frequency modulation of alternating current (AC) generator, were developed in the Air Force Institute of Technology [3, 9-10]. The essence of their accuracy lies in "natural" synchronizing of sampling with angular speed of the observed kinematic pair – if the dynamic processes of the observed object accelerate, the sampling becomes faster too [9-10]. At the same time, around the "synchronization points", due to the clearance in the power transmission there is a certain natural oscillation between the observed kinematic pair and generator’s rotor − vibrations are created. These vibrations are called jitter [9, 23] and they constitute an additional supplement to this method, because they provide more information on resolution and accuracy. Moreover, the abovementioned method enables to define the level of subassembly abrasive wear and its location in the time of normal operation of the powerplant [9-10]. This method allows also detecting resonances of elements on the basis of observation of shape and relative position of characteristic sets, which i.e. enable to calculate the mechanical quality factor of kinematic pair − it is possible to establish the operation time of kinematic pair until entering the resonance degradation. Other numerous parameters associated with the assembly of power unit rotor were also outlined: rotor skew angle, level of frictional wear of bearing cage − lack of contact of bearing components, bearing assembly ovalisation.

Słowa kluczowe

EN

aviation; alternator; frequency modulation; helicopter gearbox; bearing wear; gear wear; Health and Usage Monitoring System; HUMS; power transmission; characteristic pattern

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2018
• Tom: Vol. 25, No. 4
• Strony: 517--524
• Opis fizyczny: Bibliogr. 26 poz., rys.

Twórcy

autor

Gębura A.

• Air Force Institute of Technology, Division for Avionics Ksiecia Boleslawa Street 6 Warsaw 01-494 Poland tel.: [phone], fax: [phone]

autor

Stokowski M.

• Air Force Institute of Technology, Division for Aero Engines Ksiecia Boleslawa Street 6 Warsaw 01-494 Poland tel.: [phone], fax: [phone]

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).